MQ-510 Full Spectrum Underwater LED PAR Meter (OPEN BOX)

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$429.00 $538.00

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Purchase a new Apogee MQ-510 PAR Meter and return it for a refund within 60 days, EVEN IF YOU HAVE USED IT!

Measure your lights PAR with an Apogee MQ-510 PAR Meter. When you are done, return the meter back to us within 60 days from the purchase date for a refund, even if you have used it. If you do not need the PAR meter after tuning your lights, and just as long as the meter is functional, send it back to us for a refund minus a $80 restocking fee.
Click here to see more info on new Apogee MQ-510 PAR Meter Refund Policy


Increased Accuracy for Underwater LED Lighting Measurements!

Apogee's MQ-510 PAR meter is perfect for underwater testing of LED light intensity and immersion effect correction factor has already been applied through the monitor's firmware giving you the corrected underwater value.

  • Designed for underwater use
  • Full Spectrum
  • Works will all lighting types
  • Improved spectral response
  • 2-meter shielded cable


The MQ-510 Par Sensor has been specifically designed to give reliable and repeatable readings underwater with LED lighting. With an increased spectral range, and larger sensing optic you will get more precise readings with all types of lighting systems. Apogee now has the immersion correction factor installed in the meter and will automatically compensate for any effects underwater readings may have.


Apogee has calibrated the MQ-510 sensor with electronic lights that is stored in the firmware of the meter. Calibration with electronic lighting makes it the perfect PAR meter for any type of aquarium lighting. The sensor has a housing designed to be fully weather-proof and self-cleaning allowing years of service with minimal maintenance.


No more days of looking and guessing how much light is being put into your tank. Apogee is the leader in radiation sensing devices and recently introduced the MQ-510 USB Powered Quantum PAR Sensor that now corrects for underwater variables. PAR (photosynthetic active radiation) is the easiest way to measure the available light for corals to consume and use for photosynthesis. With LED lights giving more and more control to the consumer the best thing is a PAR meter that is affordable and simple to use. With PAR readings you can monitor light degradation, clarity of the water, and intensity of the lighting schedule. Most LED lights out on the market today have more power than what your corals can take and will quickly bleach out from too much light. By having a PAR meter to monitor the light intensity you will have tangible numbers to go off of, instead of just guessing.


We personally like inputting all of our reading into a spreadsheet to make a chart of light output and overlay the readings on a photo as well. Having a picture with your tanks PAR levels is very handy to have when placing new corals in your tank.


  • Resolution - 0 to 4000 μmol m-2s-1
  • Calibration Uncertainty - ± 5 %
  • Measurement Repeatability - less than 0.5 %
  • Response Time - less than 1ms
  • Field of View - 180°
  • Spectral Range - 389 to 692 nm ± 5 nm (wavelengths where response is greater than 50% of maximum)
  • Sensor Dimensions - 2.4 cm diameter and 3.7 cm height
  • USB Cable - 2 m (6 ft)
  • Warranty - 4 years


What's Included?

1x Apogee MQ-510 PAR Meter and Sensor


MQ-510  Spec Sheet MQ-510 Spec Sheet


MQ-510 Owners Manual MQ-510 Owners Manual


Open Box Apogee MQ-510 PAR Meter Return Policy

We (Bulk Reef Supply) accept returns on used, but functional PAR Meters for 60 days from the date of purchase. PAR Meters must be returned with all accessories included. A $80.00 restocking fee will be applied to all Apogee MQ-510 PAR Meters. Return shipping is not included and shipping charges are not refundable. 

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Product Questions

Does this come with the wand?
Question by: Manuel Valente on Aug 17, 2023, 11:48 AM
Hey there,
Thank you for reaching out to us. No, it does not.

Please let me know if you need anything further and take care!
Answer by: Matt Lucero (BRS Staff) on Aug 18, 2023, 7:05 AM
In the description it says it will read all lights. I have leds and 4 t-5s. Would this read everything?
Question by: Joe on Mar 22, 2022, 8:49 PM
Hey Joe, thanks for the question! You are correct! This is a good PAR meter for that application
Answer by: James Johnson (BRS Staff) on Mar 24, 2022, 3:23 PM
Does it come with a case. How is it returned? Do you have to use the box it came in? What is case dimensions?
Question by: Michael Beck on Jan 10, 2022, 9:22 PM
This does not come with a case and you can return it in the box it comes in.
Answer by: Matt Lucero (BRS Staff) on Jan 13, 2022, 12:54 PM
How is the device powered? Does it need to be plugged into a computer?
Question by: Josh on Jan 6, 2022, 3:43 PM
The meter is powered by a coin cell battery (CR2320). You would need an accessory cable to plug the unit into a computer. The AC-100 cable is required to download data recorded in Apogee handheld meters to a computer. The cable houses electronics to convert the signal from the meter into a USB signal that a computer recognizes. You would then need the ApogeeAMS software on a computer to interface with the meter.
Answer by: Rick Pucciarella (BRS Staff) on Jan 14, 2022, 3:02 PM
Is there a warranty on the open box part meters? If so, is it the same warranty as the non-open box meters?
Question by: Chris Dull on Dec 31, 2021, 8:56 PM
The open box would have a 30-day warranty. Those are mostly meant for the rental program, but you can chose to keep it.
Answer by: Matt Lucero (BRS Staff) on Jan 14, 2022, 9:57 AM
How are we to convert the measurement of this meter into PAR? Or is there no conversion required?
Question by: Ryan Mckay on Apr 2, 2020, 9:24 AM
Hi there,

There is no conversion needed, it will display the PAR reading on the screen in real time.

Take care
Answer by: Thomas Billington on Apr 2, 2020, 3:52 PM